diff --git a/.flake8 b/.flake8
new file mode 100644
index 00000000..94af96a2
--- /dev/null
+++ b/.flake8
@@ -0,0 +1,4 @@
+[flake8]
+exclude = .git,__pycache__,.venv,venv
+per-file-ignores =
+    examples/*: F821
\ No newline at end of file
diff --git a/examples/.pydocstylerc b/examples/.pydocstylerc
index 05a2fa6c..4d4d1367 100644
--- a/examples/.pydocstylerc
+++ b/examples/.pydocstylerc
@@ -1,2 +1,2 @@
 [pydocstyle]
-ignore = D100,D101,D102,D103,D105,D107,D203,D213,F821
+ignore = D100,D101,D102,D103,D105,D107,D203,D213
diff --git a/src/dependency_injector/wiring.py b/src/dependency_injector/wiring.py
index fbc99c7a..45ffd2ba 100644
--- a/src/dependency_injector/wiring.py
+++ b/src/dependency_injector/wiring.py
@@ -1027,7 +1027,7 @@ def _get_sync_patched(fn: F, patched: PatchedCallable) -> F:
     return cast(F, _patched)
 
 
-def _get_members_and_annotated(obj: Any) -> Iterable[tuple[str, Any]]:
+def _get_members_and_annotated(obj: Any) -> Iterable[Tuple[str, Any]]:
     members = inspect.getmembers(obj)
     try:
         annotations = inspect.get_annotations(obj)